【转载】JavaScript处理事件的一些兼容写法

1. var addEvent = function( obj, type, fn ) {
2. if (obj.addEventListener)
3. obj.addEventListener( type, fn, false );
4. else if (obj.attachEvent) {
5. obj["e"+type+fn] = fn;
6. obj.attachEvent( "on"+type, function() {
7. obj["e"+type+fn]();
8. } );
9. }
10. };

1. var addEvent = (function () {
2. if (document.addEventListener) {
3. return function (el, type, fn) {
4. el.addEventListener(type, fn, false);
5. };
6. } else {
7. return function (el, type, fn) {
8. el.attachEvent('on' + type, function () {
9. return fn.call(el, window.event);
10. });
11. }
12. }
13. })();

onpropertychange是微软 制造的一个事件，它在一个元素的属性发生变化的时候触发，常见的有文本的长度改变，样长改变等，FF大致和它相似的属性为oninput事件，不过它只针对textfield与textarea的value属性。safari，firefox，chrome与 opera都支持此属性。

1. var addPropertyChangeEvent = function (obj,fn) {
2. if(window.ActiveXObject){
3. obj.onpropertychange = fn;
4. }else{
5. obj.addEventListener("input",fn,false);
6. }
7. }

1. var removeEvent = function( obj, type, fn ) {
2. if (obj.removeEventListener)
3. obj.removeEventListener( type, fn, false );
4. else if (obj.detachEvent) {
5. obj.detachEvent( "on"+type, obj["e"+type+fn] );
6. obj["e"+type+fn] = null;
7. }
8. };

1. var loadEvent = function(fn) {
2. var oldonload = window.onload;
3. if (typeof window.onload != 'function') {
4. window.onload = fn;
5. }else {
6. window.onload = function() {
7. oldonload();
8. fn();
9. }
10. }
11. }

1. var stopEvent = function(e){
2. e = e || window.event;
3. if(e.preventDefault) {
4. e.preventDefault();
5. e.stopPropagation();
6. }else{
7. e.returnValue = false;
8. e.cancelBubble = true;
9. }
10. },

1. var stopPropagation = function(e) {
2. e = e || window.event;
3. if (!+"\v1") {
4. e.cancelBubble = true;
5. } else {
6. e.stopPropagation();
7. }
8. }

相当于Prototype.js框架的Event.element(e)

1. var getEvent = function(e){
2. e = e || window.event;
3. var target = event.srcElement ? event.srcElement : event.target;
4. return target
5. }

1. var getEvent = function(e) {
2. var e = e || window.event;
3. if (!e) {
4. var c = this.getEvent.caller;
5. while (c) {
6. e = c.arguments[0];
7. if (e && (Event == e.constructor || MouseEvent == e.constructor)) {
8. break;
9. }
10. c = c.caller;
11. }
12. }
13. var target = e.srcElement ? e.srcElement : e.target,
14. currentN = target.nodeName.toLowerCase(),
15. parentN = target.parentNode.nodeName.toLowerCase(),
16. grandN = target.parentNode.parentNode.nodeName.toLowerCase();
17. return [e,target,currentN,parentN,grandN];
18. }